Protection of Magnetic Disks From Environmental Corrosion by Plasma- Polymerized Coatings
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01
A plasma-polymerized fluorocarbon coating is an effective mechanism for the protection of metal substrates from corrosive environments. Polymerized layers, as thin as 100 Ao, have been found to successfully block more than 99% of the surface. A fluorocarbon polymer was deposited on both copper and cobalt phosphate substrates. Hexafluoropropylene was selected as the monomer because of the hydrophobic property of poly-hexafluoropropylene (PHFP). Plasma polymerization was performed in a parallel plate system and deposition rates ranging between 100 Ao and 170 Ao per minute were achieved. The effectiveness of the thin plasma-polymerized films on both copper and cobalt phosphate samples for corrosion protection in an aqueous medium was tested by electrochemical techniques.